Here is a fun 1992 pattern from McCall's (#5894) that is UNCUT and size 10, 12 and 14 that they call a jumpsuit.
Very loose-fitting jumpsuit in two lengths has self-lined bodice, ties sewn into side front and side back seams, and legs gathered into barrel cuffs; cuffs for longer length are notched; headband and instructions for trimming socks included.
Size 10 Chest 28 1/2", Waist 24 1/2", Hip 30'
Size 12 Chest 30", Waist 25 1/2", Hip 32"
Size 14 Chest 32", Waist 26 1/2", Hip 34"
The pattern and instructions are still factory folded. The envelope shows wear from age and storage.